Naches Thunderegg with Onion Rings

7cm

Onion Ring formations, where the rock splits into very fine layers are quite common in a few specific locations (Lierbachtal and Esterel spring to mind) but in thundereggs as a whole are very rare.  Here though is an onion ring specimen from Naches River Bed 1 in Washington State – a lovely pale specimen with cloudy waterline agate.